384 INSECTIVOROUS BIRDS. 



and constant company of its faithful mate. This note, 

 uttered at intervals of half a minute, is like the sound of 

 tsh' tsh tsh tshe tshe, from low to high, but altogether so 

 shrill and slender as to sound almost like the faint filing 

 of a saw. This species extends its migrations to New- 

 foundland according to Pennant. Its nest, like that of 

 the following species, to which it is much allied, will 

 probably be found on the ground, or in the hollow of a 

 decayed tree. 



The Black-Poll Warbler is 5^ inches long, and 8^ in alar extent. 

 The crown and hind-head is black (in the male), the latter bounded 

 behind by greyish white. Cheeks white ; from each side of the 

 lower mandible runs a chain of small black spots becoming larger on 

 the sides ; primaries black, edged with greenish yellow. Back ash, 

 a little inclining to olive, and largely spotted with black. Tail black, 

 edged with ash ; vent white. Bill black above, yellowish white be- 

 low. Iris hazel. Legs and feet yellow. 



BLACK AND WHITE WARBLER, or CREEPER. 



(Sylvia varia, Lath. Audubon, pi. 90. Orn. Biog. i. p. 4-52. Certhia 

 maculaia, Wilson, iii. p. 26. pi. 19. fig. 3. Phil, Museum, No. 

 7092.) 



Sp. Charact. — Varied with black and white; the crown striped 

 with black ; belly pure white. — Male, with the throat black. — 

 Female and young, with the throat greyish white. 



This remarkable bird, allied to the Creepers, and of 

 which Vieillot forms a distinct genus,* is another rather 

 common summer resident in most parts of the United 

 States, and probably migrates pretty far to the North. It 

 arrives in Louisiana by the middle of February, visits 

 Pennsylvania about the second week in April, and a 

 week later appears in the woods of New England, pro- 

 tracting its stay in those countries till the beginning of 

 October, and lingering on the southern limits of the 



+ Mniotilta. 



